CVE-2026-64136
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved:
smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked()
Commit 96c4af418586 ("cifs: Fix locking usage for tcon fields") refactored cifs code to change cifs_tcp_ses_lock for tc_lock around tc_count changes.
There was missing lock around tc_count increment inside smb2_find_smb_sess_tcon_unlocked().
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 953953abb66e52c224057ab91e404284fefeab62 < 7df1df6f40c0720d30206aa35c0343b962350e0d | affected |
| Linux | Linux | 601dd3b79769b38d30b693c40afdb2a4b7edf9d0 < 13fb413ae22a37c69341918a6d651d19a9b0b9b7 | affected |
| Linux | Linux | 3969db6b22e3d90d8c5f22ac1a7fe0350a94c136 < bf4ebdb19ff9b3cdf992b50715fe61633327416a | affected |
| Linux | Linux | 96c4af418586ee9a6aab61738644366426e05316 < e374f4e496fef8168784f93a4477d67be34485fd | affected |
| Linux | Linux | 96c4af418586ee9a6aab61738644366426e05316 < 4d8690dace005a38e6dbde9ecce2da3ad85c7c41 | affected |
| Linux | Linux | 8c59eeeeffa1524ef57e173a89a1a3ff539888d5 | affected |
| Linux | Linux | 6.6.128 < 6.6.142 | affected |
| Linux | Linux | 6.12.75 < 6.12.92 | affected |
| Linux | Linux | 6.18.16 < 6.18.34 | affected |
| Linux | Linux | 6.19.6 < 6.20 | affected |
| Linux | Linux | 7.0 | affected |
| Linux | Linux | 0 < 7.0 | unaffected |
| Linux | Linux | 6.6.142 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.92 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.34 <= 6.18.* | unaffected |
| Linux | Linux | 7.0.11 <= 7.0.* | unaffected |
| Linux | Linux | 7.1 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/7df1df6f40c0720d30206aa35c0343b962350e0d
- https://git.kernel.org/stable/c/13fb413ae22a37c69341918a6d651d19a9b0b9b7
- https://git.kernel.org/stable/c/bf4ebdb19ff9b3cdf992b50715fe61633327416a
- https://git.kernel.org/stable/c/e374f4e496fef8168784f93a4477d67be34485fd
- https://git.kernel.org/stable/c/4d8690dace005a38e6dbde9ecce2da3ad85c7c41
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